update-initramfs - generate an initramfs image
update-initramfs {
-c|
-d|
-u} [
-k
version] [
-v] [
-b directory]
update-initramfs -h
The
update-initramfs script manages your initramfs images on your local
box. It keeps track of the existing initramfs archives in /boot. There are
three modes of operation create, update or delete. You must at least specify
one of those modes.
The initramfs is a gzipped cpio archive. At boot time, the kernel unpacks that
archive into RAM disk, mounts and uses it as initial root file system. All
finding of the root device happens in this early userspace.
-
-k version
- Set the specific kernel version for whom the initramfs will
be generated. For example the output of uname -r for your currently
running kernel. This argument is optional for update. The default is the
latest kernel version.
The use of "all" for the version string specifies that
update-initramfs should operate on all installed kernel versions
(with -c), or on all installed kernel versions that already have an
initramfs (with -d or -u).
- -c
- This mode creates a new initramfs.
- -u
- This mode updates an existing initramfs.
- -d
- This mode deletes an existing initramfs.
- -v
- This option increases the amount of information you are
given during the chosen action.
-
-b directory
- Set an different bootdir for the image creation.
-
-h, --help
- Print a short help page describing the available options in
update-initramfs.
Update the initramfs of the newest kernel:
update-initramfs -u
Create the initramfs for a specific kernel:
update-initramfs -c -k 2.6.18-1-686
/etc/initramfs-tools/update-initramfs.conf
The initramfs-tools are written by Maximilian Attems <
[email protected]>,
Jeff Bailey <
[email protected]> and numerous others.
initramfs.conf(5),
initramfs-tools(7),
mkinitramfs(8),
lsinitramfs(8).